What is the sum of 5.4 + (-9.7)

Arestaurant offers a $12 dinner special that has 5 choices for an appetizer, 12 choices for an entrée, and 4 choices for a dessert. how many different meals are available when you select an appetizer, an entrée, and a dessert? a meal can be chosen in nothing ways. (type a whole number.)

Maria walks a round trip of 0.75 mile to school every day.how many miles will she walk in 4.5 days

What’s 8y+48 and factor each expression completely